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Import experimental write-ahead-logging code.

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FossilOrigin-Name: 409d61baeb0a19d1700c973f16c8acef7b8506cd
This commit is contained in:
dan
2010-04-12 19:00:29 +00:00
parent eada58aa49
commit 7c24610e64
14 changed files with 2772 additions and 231 deletions
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48
src/pragma.c
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@@ -445,6 +445,31 @@ void sqlite3Pragma(
returnSingleInt(pParse, "secure_delete", b);
}else
/*
** PRAGMA [database.]secure_delete
** PRAGMA [database.]secure_delete=ON/OFF
**
** The first form reports the current setting for the
** secure_delete flag. The second form changes the secure_delete
** flag setting and reports thenew value.
*/
if( sqlite3StrICmp(zLeft,"secure_delete")==0 ){
Btree *pBt = pDb->pBt;
int b = -1;
assert( pBt!=0 );
if( zRight ){
b = getBoolean(zRight);
}
if( pId2->n==0 && b>=0 ){
int ii;
for(ii=0; ii<db->nDb; ii++){
sqlite3BtreeSecureDelete(db->aDb[ii].pBt, b);
}
}
b = sqlite3BtreeSecureDelete(pBt, b);
returnSingleInt(pParse, "secure_delete", b);
}else
/*
** PRAGMA [database.]page_count
**
@@ -515,7 +540,7 @@ void sqlite3Pragma(
if( sqlite3StrICmp(zLeft,"journal_mode")==0 ){
int eMode;
static char * const azModeName[] = {
"delete", "persist", "off", "truncate", "memory"
"delete", "persist", "off", "truncate", "memory", "wal"
};
if( zRight==0 ){
@@ -561,6 +586,7 @@ void sqlite3Pragma(
|| eMode==PAGER_JOURNALMODE_TRUNCATE
|| eMode==PAGER_JOURNALMODE_PERSIST
|| eMode==PAGER_JOURNALMODE_OFF
|| eMode==PAGER_JOURNALMODE_WAL
|| eMode==PAGER_JOURNALMODE_MEMORY );
sqlite3VdbeSetNumCols(v, 1);
sqlite3VdbeSetColName(v, 0, COLNAME_NAME, "journal_mode", SQLITE_STATIC);
@@ -1383,6 +1409,26 @@ void sqlite3Pragma(
}else
#endif /* SQLITE_OMIT_COMPILEOPTION_DIAGS */
if( sqlite3StrICmp(zLeft, "checkpoint")==0 ){
int nMin = 0;
int nMax = 0;
int nosync = 0;
if( zRight ){
char *z = zRight;
sqlite3GetInt32(z, &nMin);
while( sqlite3Isdigit(*z) ) z++;
while( *z && !sqlite3Isdigit(*z) ) z++;
sqlite3GetInt32(z, &nMax);
while( sqlite3Isdigit(*z) ) z++;
while( *z && !sqlite3Isdigit(*z) ) z++;
sqlite3GetInt32(z, &nosync);
}
sqlite3VdbeUsesBtree(v, iDb);
sqlite3VdbeAddOp2(v, OP_Transaction, iDb, 1);
sqlite3VdbeAddOp3(v, OP_Checkpoint, iDb, nMin, nMax);
}else
#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
/*
** Report the current state of file logs for all databases